great cerebral vein vs vena cerebri magna

great cerebral vein and vena cerebri magna both are nouns.

Word	Noun	Adjective	Verb	Adverb
great cerebral vein	Yes	No	No	No
vena cerebri magna	Yes	No	No	No

As nouns, great cerebral vein and vena cerebri magna are synonyms defined as:

great cerebral vein and vena cerebri magna: a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus

great cerebral vein (noun)	vena cerebri magna (noun)
a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus	a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus